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Tunneling machine's front end bolted in place PDF Print E-mail
Written by Randy Post   
Sunday, 30 August 2015 23:25

Bertha TBM cutterhead being lowered back into access shaft

The troubled Alaska Way Viaduct Replacement Tunnel TBM known as Bertha has reached a milestone in its repair. The front cutterhead has been repaired, and has been lowered back into the access shaft to be re-attached to the TBM. The time-lapse video below shows the cutterhead being lowered down into the access shaft. What caught my eye was the number of steel cables on the crane blocks...that's a heavy lift!

Time Lapse Video

[Source: WSDOT Alaskan Way Viaduct Project Page. Image: WSDOT]

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Last Updated on Monday, 31 August 2015 06:29